Diagnostic ultrasonic imaging system having run extracting means for extracting point closest to start point of scanning lines

摘要

Data provided by sound rays acquired by performing spiral scanning using ultrasonic waves is converted into image data through polar coordinate transformation. Data of slices is displayed and scanned along each scanning line from a start point of scanning lines to a far point. A point closest to the start point of scanning lines is extracted from each run of consecutive points at which luminance values exceed a threshold while a run of points having an unacceptable length is eliminated as a noise. Thus, the surface of an object is extracted.